Molding-machine.



A. D. INESON & P. 0. SMITH.

MOLDING MACHINE.

APPLICATION FILED MARZ. 1912.

Patented Feb. 4, 1913.

2 SHEETSSHEET l.

w my 6m 9 13. a may 2 A. D. INESQN & P, 0. SMITH.

MOLDING MACHINE.

APPLIOATION FILED MAR.2. 1912.

Patented Feb. 4, 1913.

2 SHEETSSHEET 2 UNITED STATES PATENT OFFICE.

ALVA D. INESON AND PHILIP 0. SMITH, OF EA STON, PENNSYLVANIA.

MOLDING-MACHIN E.

Specification of Letters Patent.

Patented Feb. 4=, 1913.

Application filed March 2, 1912. Serial No. 681,080.

' PHILIP C. SMITH, citizens of the United States, residing at Easto'n, in the county of -Northampton and State of Pennsylvania, .have invented certain new and useful Improvements in lWlolding-lvlachines, of which the following is a specification.

Our invention relates to improvements in molding machines, and more particularly to an improved machine which bumps or ars the mold and effectually rams-green and dry sand molds and cores, the machine being operated entirely by compressed air dispensing with the necessity for any springs, levers, weights, clips, rods and the like which :are common on machines of this type heretofore in use.

A further object is to provide an im" proved machine of th1s character which is self lubricating, maintaining all of the movable parts lubricated and free from sand and dirt which might interfere with the operation thereof.

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1, is a view in vertical longitudinal section illustrating our improvements. Fig. 2, is a fragmentary view on an enlarged scale in vertical section taken on the line 22 of Fig. 1 and showing the parts in elevation to more clearly illustrate the arrangement of air ducts and ports. Fig. 3, is a fragmentary View in horizontal section on the line 33 of Fig. 1. Fig. 4., is a view in horizontal section on the line 44 of Fig. 1. Fig. 5, is a fragmentary view in horizontal section on the line 5-5 of Fig. 1.- Fig. 6,

is a fragmentary view partlyin vertical sec-. tion. and partly in elevation illustrating the emergency exhaust, and Fig. 7, is a view in section on the line 77 of Fig. 6.

1, represents a relatively heavy metal base on which a cylinder 2 is secured by bolts 3. This cylinder 2 is provided with a removable bushing 4 in which a piston 5 is mounted to 11 to accommodate the bolts and nuts. vA

pin 12, having a screw-threaded upper end', is screwed into a threaded socket 13in table 6, and this pin fits a sleeve 1 1 integral with casing 2, and guides the vertical movement of piston 5 and table 6, preventing any rotary movement. A bumping block 15 is providedwith a screw-threaded shank 16 which screws into a. threaded opening 17 in the lower end of piston 5 at the center thereof, and this block 15 serves to limit the downwardmovement of the piston and the table, and sustains the shock of the fall of the piston when said block strikes the base 1 as will more fully hereinafterappear. The casing 2, atone side, is made with an integral valve chamber 17 which has a cylindrical bore receiving a bushing 18 which may be removed and replaced when worn.

On the upper end of the valve casing, a hollow dome 1.9 is secured by screws 20, and through thishollow dome 19, a bushing 21 projects, and acts as a guide for the upwardly projecting stem 22 of a valve 23. This bushing 21 is provided with relatively small openings 24 through which lubricant may pass from -the dome to the valve stem and be communicated to the valve as is necessary. The hollow dome 19, as well as the hollow piston 5, are packed with min eral wool or other suitable material 25 which is saturated with lubricant and feeds the same tothe movable parts. e

The center of table 6 is provided with a threaded opening 26 for the reception of lubricant to the wool 25 in piston 5, and

this opening is normally closed by a removable plug 27. The wool 25 in dome 19 is supplied with lubricant poured through tele scoping tubes. 28 and 29, the former is secured in a threaded opening in the table 6, normally closed by a removable plug 30 and the latter is screwed into a threaded opening in the top of dome 19, so that while the table permitted a vertical movement relative to the dome, the telescoping of these tubes always maintains a passage from the inlet to the dome, and the latter may be supplied with lubricant at any position of the table.

The valve 23 is made with four annular flanges 31, the upper and lower pair being connected by the split rings 32 and the space between the flanges of the upper and lower ports, and back of said rings 32 is filled by pieces of felt which absorbs the lubricant and prevents any access of lubricant in the bottom of the valve chamber. When the valve is in its lower position, itsannular port 34 which is provided between the upper and lower ports of flanges 31 registers with an inlet 35 for compressed air, and serves to connect said inletwith two ducts 36, both of which extend inwardly and downwardly and communicate with the cylinder 2 in the space below piston 5, so that the air which enters through these duets will serve to elevate the piston. I

The lower ring 32, when the valve'is in the position above described, closes an outlet 50 and a circular series of outlets 37 in the valve chamber, and it will be noted that the lowermost flange is ls'paced above the bottom of the valve chamber, and that the lower end of the valve stem rests upon a verti cally movable plunger 38 which has a flange 39 at its upper end, limiting its downward n'mvelnent. This plunger 38 norn'ially closes one end of a relatively large air passage 40, the other end of said passage being normally closed by a plug 41 which is screwed into the lower end of piston 5. One end of a passage 42 eomn'iunicates with the valve chamber between the plunger 38 and the lowermost flange 3'1. and. this passage eX- tends through the wall of the valve chamber and the cylinder. and communicates with the cylinder at a point illustrated at 42} which is slightly above the normal movement of the piston, so that this passage will only be opened by the movement of the pis ton when the latter moves abnormally due to some detect in the operation of the valve. This passage is illustrated clearly in Fig. 2, and is formed at right angles by coring or boring, and the normal open ends of said borings or eorings are closed by plugs l-t.

The piston 5 is provided with packing rings 15 which are hibricalcd is is also the interior oi the cylinder through the medium of a duct ll which connects the interior ol the hollow piston with the outer i'arc throw of, and of course the invention is not limited to any particular number o'l these ducts. ln the wall of cylinder 2. at a point above the normal movement of the lower end ot piston 5, a series of outlets l7 are provided, and are protected from the dirt and sand by an integral hoodlS which is open at its lower end. These outlets 47 are normally closed by the piston and are open only in the event oi failure of the valve to work properly, so as to prevent the table from being raised abnormally. v

The operation of our improvements is as follows: Assuming the parts to be in the position shown in Fig. 1, the compressed air is entering inlet and passing through port 34. and ducts 36 into the cylinder 2 be low the piston 5, causing thelatter to move upwardly. 'hen the piston reaches a predetermined height, the plug ll willbe moved out of the passage 40, and the air below the piston will rush through this passage, caus ing the plunger 38 to elevate and move the valve vertically. The lower band 32 will then close the inlet and open the outlets 37, so that the air below the piston will'rush out. causing the piston and the table to fall. This downward movement is limited by block 15 striking base 1, which gives a jar or bump to the table and the mold or core thereon. At. the same time, the downward movement of the table forces the valve downwardly to its former position, by reason of the fact that an integral web 49 on the under face of the table will strike the upper end of the valve stem 22, and force the valve downwardly. ,lYe provide a plurality of these webs 49 to strengthen the table, and one of them is positioned over the valve stem as above explained. It for any reason the plunger 38 should not move vertically to elevate the valve at the proper time, a continued upward movement of the piston 5 will open the end 43 of passage 42. The air will then rush through this passage into the lower end of the valve chamber, and. cause the valve to elevate and operate as "above described. If this is not eltective, and the piston continues to rise, the lower end of the piston will open the outlets'47, so that the air will rush out through these outlets and the table will fall. The passages 42 and the outlets 17 are t-heretore emergency outlets for the compressed air. and they prevent'the table from being accidentally ele vated to too great a height. It will therefore be noted that our improved inzuvhine operated solely by the action of compressed air, the admission and exhaust. of which be ing automatically controlled by the move ment of the piston and the valve, so that a rapid series of bumps or jars are impartial to the table to eli'ecluallv perform the work for which the machine is intended.

Various slight ihanges might be made in the general term and arrangement of parts described without departing from our invention, and hence we do not limit ourselves to the precise details set forth, but consider ourselves at liberty to make such changes and alterations as fairlyjfall within the spirit and scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secureby Letters Patent is:

l; A machine of the character described, comprising a base, a vertical cylinderon the base, a piston in the cylinder, a table on the upper end of the piston, a valve chamber, air inlet and exhaust ports connecting the valve chamber and the cylinder below the piston, a valve in said chamber, a block on the lower end of said piston constructed to strike the base and jar the table when the piston falls, and a casing secured to'the base and projecting upwardly under the table, said base having a passage-therein con- .necting the valve chamber with the cylinder, and a plunger secured to the piston and controlling the movement of air through said passage, substantially as described.

2. A machine ofthe character described, comprising a base, a vertical cylinder on the base, a piston in the cylinder, a table on the upper'end of the piston, a valve chamber, air inlet and exhaust ports connecting the valve chamber and the cylinder below the piston,,a valve in said chamber, a block on the lower end of said piston constructed to strike the base and jar-the table when the piston falls, a casing secured to' the base and projecting upwardly under the table, said base havinga passage therein-connecting the valve chamber with the cylinder, a plunger secured to the piston and controlling the movement of .air through said passage, and said cylinder having emergency outlets closed by the piston in its normal movement and opened when said piston is elevated abnormally, substantially: as described.

3. A machine of the character described, comprising a base, a vertical cylinder on the base, a piston in the cylinder, a table on the upper end of the piston, a valve chamber, air inlet and exhaust ports connecting the valve chamber and the cylinder below the piston, a valve in said chamber, a block on the lower endof said piston constructed to strike the base and jar the table when the piston falls, and a casing secured to the. base and projecting upwardly under the table, said base having a passage therein connecting the valve chamber with the cylinder, and a plunger secured to the cylinder and controlling the movement of air through said passage, and said cylinder having emergency outlets closed by the piston in its normal movement and opened when said piston is elevated abnormally, substantially as described. I f

4.- A machine of the character described, comprising a base, a vertical cylinder on the base, a piston in the cylinder, a table on the upper-end of the piston, a valve chamber, ail-inlet and exhaust ports connecting'the valve chamber and the cylinder below the is ton, a valve in said chambercontrolled so ely- 'by the movement of the. piston and the air,

whereby the piston is caused to rise and to fall, said base having a assage therein connecting the valve chain or with the? cylinder, a plunger secured to the pistonlandcon trolling the movement of airthrough said passage, 2. depending flange on said table,-

and a casing secured -to the baseinclosing said cylinder and valve chamber and projecting upwardly inside of the flange on the table, substantially as described.

5. A machine of the character described, comprising a base, a vertical cylinder on the base, a piston in the cylinder, atable on theupper end of the piston, a valve chamber,

air inlet and. exhaust portsmonhecting the valve chamber and the cylinder below the piston, a valve in said chamber controlled solely by the movement of the piston and the air, whereby the piston .is caused to rise and to fall," and a block on the lower end- .of said piston constructed to strike the base and jar the table when the-piston falls, said base having a passage therein connecting the valve. chamber with the cylinder, fa

plunger secured to the piston and control ling the movement of air through sa1d"pas-' sage, a depending flange on said table, and j a casing secured to the .base inclosingsaid cylinder and valve, chamber and projecting upwardly inside of the fiangeon the table, I v Y substantially as described,

6. A machine of the character described,

comprising a base, a cylinder secured on the base, an integral sleeve on one side of said cylinder, a piston movable in the cylinder,a.

table on the piston, a'pin secured in the tachamber at one side of the casing, a vertically movable valve in said chamber conble and movable in the guide sleeve, a valvetrolling the flow" of air to and from the cy-L:

inder below the piston, said piston con-} 'structed to be elevated by the action or air when the piston reaches a pre-determmed height, and a stem on said valve-struckby the table in its downward movement close the exhaust and open the lnlet .to said cylinder, substantially as described.

7. A machine of the character described,

comprising a base, a cylinder-secured on the base, an integral sleeve on one side of said cylinder, a piston movable in the cyl1nder, a table on the piston, a pin secured in the table and movable in the guide sleeve, a .valve chamber at one side of the casing, a,verti, cally movable valve in said chamber controlling the'flow'of air to and-from the cyl-] inder below the piston, said piston con structed to be elevated by the action .of air when the piston reaches a predetermined names to this specification in the presence of two subscribing Witnesses.

ALVA D.,INESON. PHILIP C. SMITH.

Witnesses: I

G. M. WELLER J0H1I F. UARNEY.

height, radial integral Webs on the under face of said table and a stem on said valve adapted to be struck by one of said Webs in the downward movement of the table to move the valve in its lowermost position, substantially as described.

In testimony whereof We have signed 0111 

